Math is too_____ for me．
But it is very useful．Please don't give up．（ ）
A．deliciousB．favoriteC．difficultD．different
Laiwu has developed a lot in the last few years．
Yes． And the high﹣speed rail ____ in 2020．（ ）
A．completesB．is completed
C．will be completedD．will complete
Could you help me clean the floor， Bob？
Wait a moment，I _____ for some information about the World Cup．（ ）
A．searchB．have searched
C．am searchingD．was searching
Recently people in China ____ take much money on shopping because they often use the mobile phone instead．（ ）
A．needn'tB．shouldn'tC．mustn'tD．can't
Anna is preparing for the coming exam， so she has to ____ the invitation to the party．（ ）
A．turn onB．turn downC．turn offD．turn up
____ have you talked with your friends on the phone？
Since I finished my homework．（ ）
A．How farB．How oftenC．How soonD．How long